I have a problem on my BAR-10 G. After setting the sights and practicing on targets for hours, the gun starts to rebuke shooting after i cock it. The bb's go inside the chamber but they don't seem to be firing after i pull the trigger, though I hear the spring release, the bb just stays in the chamber and i have to take the magazine out and cock it once or twice more to get the bb in the chamber out. If i upgrade the gun and reassemble everything, will it solve the problem? Since it would be like a brand new one after assembling it back together again anyways after the upgrade to approximately 600fps. P.S: I just got this sniper rifle like 7 hours ago, pretty disappointed. I would appreciate all the help I can get. Thanks to all.